package com.itself.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.fastjson.JSON;
import com.itself.service.OrderService;
import com.itself.entity.Order;
import com.itself.entity.Product;
import com.itself.service.ProductServiceFeign;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;
import java.util.Random;

/**
 * @author xukang
 * @date 2021-01-21 16:06
 */
@RestController
@Slf4j
public class OrderController {
    @Autowired
    private RestTemplate restTemplate;
    @Autowired
    private OrderService orderService;

    @Autowired
    private DiscoveryClient discoveryClient;
    @Autowired
    private ProductServiceFeign productFeign;

    //准备买1件商品
    @GetMapping("/order/prod/{pid}")
    public Order order(@PathVariable("pid") Integer pid) {
        log.info(">>客户下单， 这时候要调用商品微服务查询商品信息");


        //从nacos中获取服务地址
        //自定义规则实现随机挑选服务第3步：启动两个服务提供者和一个服务消费者，多访问几次消费者测试效果
//        List<ServiceInstance> instances = discoveryClient.getInstances("service-product");
//        int index = new Random().nextInt(instances.size());
//        ServiceInstance serviceInstance = instances.get(index);
//        String url = serviceInstance.getHost() + ":" +
//                serviceInstance.getPort();
//        log.info(">>从nacos中获取到的微服务地址为:" + url);
////通过restTemplate调用商品微服务
//        Product product = restTemplate.getForObject(
//                "http://localhost:8081/product/" + pid, Product.class);
        //TODO 修改服务的调用方法
        //直接使用微服务名字， 从nacos中获取服务地址
//        String url = "service-product";
////通过restTemplate调用商品微服务
//        Product product = restTemplate.getForObject(
//                "http://" + url + "/product/" + pid, Product.class);
        //TODO
        //通过fegin调用商品微服务
        Product product = productFeign.findByPid(pid);
        log.info(">>商品信息,查询结果:" + JSON.toJSONString(product));

        //模拟一次网络延时
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        Order order = new Order();
        order.setUid(1);
        order.setUsername("测试用户");
        order.setPid(product.getPid());
        order.setPname(product.getPname());
        order.setPprice(product.getPprice());
        order.setNumber(1);
        //为了不产生太多垃圾数据,暂时不做订单保存
//        orderService.save(order);
        return order;
    }
    @RequestMapping("/order/message")
    public String message() {
        return "高并发下的问题测试";
    }
}